Here are three easy but important ways to protect yourself if you run a WordPress blog:
1. Secure your /wp-admin/ directory. What I’ve done is lock down /wp-admin/ so that only certain IP addresses can access that directory. I use an .htaccess file, which you can place directly at /wp-admin/.htaccess . This is what mine looks like:
AuthName “Access Control”
deny from all
# whitelist home IP address
allow from 188.8.131.52
# whitelist work IP address
allow from 184.108.40.206
allow from 220.127.116.11
# IP while in Kentucky; delete when back
allow from 18.104.22.168
I’ve changed the IP addresses, but otherwise that’s what I use. This file says that the IP address 22.214.171.124 (and the other IP addresses that I’ve whitelisted) are allowed to access /wp-admin/, but all other IP addresses are denied access. Has this saved me from being hacked before? Yes.
2. Make an empty wp-content/plugins/index.html file. Otherwise you leak information on which plug-ins you run. If someone wanted to hack your blog, they might be able to do it by discovering that you run an out-of-date plugin on your blog and then they could exploit that.
3. Subscribe to the WordPress Development blog at http://wordpress.org/development/feed/ . When WordPress patches a security hole or releases a new version, they announce it on that blog. If you see a security patch released, you need to upgrade or apply the patch. You leave yourself open to being hacked if you don’t upgrade.
And here’s a bonus tip: in the header.php file for your theme, you might want to check for a line like
<meta name=”generator” content=”WordPress ” />
I’d just go ahead and delete that line or at least the bloginfo(‘version’). If you’re running an older version of WordPress, anyone can view source to see what attacks might work against your blog.